A vaginal infection typically feels like persistent itching or burning in and around the vagina, often paired with unusual discharge. The exact sensations depend on the type of infection, but most people notice something is off before they can name what it is: a sting when they pee, irritation that won’t quit, or discharge that looks or smells different from normal. Three types of vaginal infections account for the vast majority of cases, and each one has a distinct feel.
Yeast Infections: Intense Itching and Thick Discharge
Yeast infections are the most recognizable type. The hallmark sensation is itching, both inside the vagina and on the outer skin of the vulva. This can range from mild and annoying to severe enough to keep you up at night. In more intense cases, the itching and swelling can actually cause tiny tears, cracks, or sores on the vulvar skin, which adds a raw, stinging quality to the discomfort.
Burning is the other dominant sensation. You’ll notice it most during two activities: urinating and having sex. The burn during urination happens because urine passes over inflamed vulvar tissue on its way out. During intercourse, the friction against already-irritated, swollen tissue intensifies the pain. Some people describe it as soreness rather than a sharp burn.
The discharge with a yeast infection is thick, white, and often compared to cottage cheese. It has no strong smell. You may also notice a white coating on the vulva or just inside the vaginal opening. Redness and visible swelling of the labia are common, and the whole area can feel warm and puffy to the touch.
Bacterial Vaginosis: Fishy Odor, Less Pain
Bacterial vaginosis (BV) feels very different from a yeast infection, and that difference catches many people off guard. BV often produces little to no itching or burning. The most noticeable symptom is a thin, grayish, sometimes foamy discharge with a distinctly fishy smell. The odor tends to be strongest after sex or during your period.
Because BV lacks the dramatic itching and pain of a yeast infection, many people don’t realize they have it. A significant number of BV cases produce no symptoms at all. You might only notice a subtle shift in your discharge or a faint odor that comes and goes. This is one reason BV often goes untreated longer than other infections. It doesn’t scream for attention the way a yeast infection does, but it still warrants treatment because it can increase vulnerability to other infections over time.
Trichomoniasis: Frothy Discharge and Irritation
Trichomoniasis is a sexually transmitted infection caused by a parasite, and it produces a combination of symptoms that overlap with both yeast infections and BV. The discharge is thin and can be clear, white, yellowish, or greenish, sometimes with a frothy or bubbly texture. It often has a fishy smell similar to BV.
Where trichomoniasis diverges is in the irritation it causes. Many people experience genital itching, burning during urination, and discomfort during sex, much like a yeast infection. But the discharge color and texture are different enough to be a clue. Some people with trichomoniasis also notice redness and soreness around the vaginal opening. Like BV, trichomoniasis can also be completely asymptomatic, so the absence of strong symptoms doesn’t rule it out.
How to Tell the Types Apart
The quickest way to narrow down which infection you’re dealing with is to pay attention to your discharge and whether you’re itching.
- Thick, white, odorless discharge with intense itching: most likely a yeast infection.
- Thin, grayish, fishy-smelling discharge with little or no itching: most likely bacterial vaginosis.
- Thin, yellowish-green, frothy, fishy-smelling discharge with some irritation: most likely trichomoniasis.
These patterns are useful starting points, but infections don’t always follow the textbook. Mild yeast infections can produce minimal discharge. BV can occasionally cause some itching. And trichomoniasis can look almost identical to BV from the outside. A clinical exam, which typically involves looking at a sample of discharge under a microscope, is the only way to confirm what’s actually going on.
What Over-the-Counter pH Tests Can and Can’t Tell You
Home vaginal pH test strips are available at most pharmacies. They measure whether your vaginal pH has shifted from its normal range of 3.8 to 4.5. BV and trichomoniasis both push the pH above 4.5, while yeast infections typically don’t change it much.
These tests show good agreement with clinical results, but they have real limitations. An elevated pH doesn’t tell you which infection you have or whether you have one at all, since hormonal changes, semen, and menstrual blood can all temporarily raise vaginal pH. A normal pH result doesn’t rule out infection either. You could have a yeast infection that doesn’t affect pH, or an early-stage infection that hasn’t shifted the numbers yet. The FDA notes that these home tests are practically identical to what doctors use, but a single pH reading is only one piece of a larger diagnostic picture.
Conditions That Feel Like an Infection but Aren’t
Not everything that itches, burns, or produces unusual discharge is an infection. One common mimic is vaginal atrophy, a condition driven by dropping estrogen levels during and after menopause. It causes dryness, burning, itching, and sometimes a thin, watery, yellowish or gray discharge. These symptoms overlap heavily with both yeast infections and BV, which is why many people assume they have an infection when the real issue is hormonal.
Vaginal atrophy also makes the tissue thinner and more fragile, which increases the likelihood of actual infections developing on top of it. So you can have atrophy and an infection at the same time, making it harder to sort out what’s causing what.
Contact irritation is another possibility. Scented soaps, laundry detergents, latex, or new hygiene products can trigger redness, swelling, and itching on the vulva that looks and feels identical to the early stages of an infection. If your symptoms started shortly after switching a product, that’s worth noting. Allergic or chemical irritation tends to improve once you remove the trigger, while an actual infection persists or worsens.